mirror of
https://github.com/freebsd/freebsd-src
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137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2010 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Rui Paulo under sponsorship from the
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* FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <rtld_db.h>
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#include "_libproc.h"
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static void rdl2prmap(const rd_loadobj_t *, prmap_t *);
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static int
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map_iter(const rd_loadobj_t *lop, void *arg)
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{
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struct file_info *file;
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struct map_info *mapping, *tmp;
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struct proc_handle *phdl;
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size_t i;
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phdl = arg;
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if (phdl->nmappings >= phdl->maparrsz) {
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phdl->maparrsz *= 2;
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tmp = reallocarray(phdl->mappings, phdl->maparrsz,
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sizeof(*phdl->mappings));
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if (tmp == NULL)
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return (-1);
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phdl->mappings = tmp;
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}
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mapping = &phdl->mappings[phdl->nmappings];
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rdl2prmap(lop, &mapping->map);
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if (strcmp(lop->rdl_path, phdl->execpath) == 0 &&
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(lop->rdl_prot & RD_RDL_X) != 0)
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phdl->exec_map = phdl->nmappings;
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file = NULL;
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if (lop->rdl_path[0] != '\0') {
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/* Look for an existing mapping of the same file. */
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for (i = 0; i < phdl->nmappings; i++)
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if (strcmp(mapping->map.pr_mapname,
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phdl->mappings[i].map.pr_mapname) == 0) {
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file = phdl->mappings[i].file;
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break;
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}
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if (file == NULL) {
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file = malloc(sizeof(*file));
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if (file == NULL)
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return (-1);
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file->elf = NULL;
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file->fd = -1;
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file->refs = 1;
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} else
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file->refs++;
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}
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mapping->file = file;
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phdl->nmappings++;
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return (0);
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}
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static void
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rdl2prmap(const rd_loadobj_t *rdl, prmap_t *map)
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{
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map->pr_vaddr = rdl->rdl_saddr;
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map->pr_size = rdl->rdl_eaddr - rdl->rdl_saddr;
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map->pr_offset = rdl->rdl_offset;
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map->pr_mflags = 0;
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if (rdl->rdl_prot & RD_RDL_R)
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map->pr_mflags |= MA_READ;
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if (rdl->rdl_prot & RD_RDL_W)
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map->pr_mflags |= MA_WRITE;
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if (rdl->rdl_prot & RD_RDL_X)
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map->pr_mflags |= MA_EXEC;
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(void)strlcpy(map->pr_mapname, rdl->rdl_path,
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sizeof(map->pr_mapname));
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}
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rd_agent_t *
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proc_rdagent(struct proc_handle *phdl)
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{
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if (phdl->rdap == NULL && phdl->status != PS_UNDEAD &&
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phdl->status != PS_IDLE) {
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if ((phdl->rdap = rd_new(phdl)) == NULL)
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return (NULL);
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phdl->maparrsz = 64;
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phdl->mappings = calloc(phdl->maparrsz,
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sizeof(*phdl->mappings));
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if (phdl->mappings == NULL)
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return (phdl->rdap);
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if (rd_loadobj_iter(phdl->rdap, map_iter, phdl) != RD_OK)
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return (NULL);
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}
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return (phdl->rdap);
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}
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void
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proc_updatesyms(struct proc_handle *phdl)
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{
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memset(phdl->mappings, 0, sizeof(*phdl->mappings) * phdl->maparrsz);
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rd_loadobj_iter(phdl->rdap, map_iter, phdl);
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}
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